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<h1 class="topictitle1">Creating a File Name Extension Filtering Rule</h1>
<div id="body0000001337156461"><p id="EN-US_TOPIC_0000001337156461__p82288715011">Known ransomware file name extensions to be intercepted are preset in the system. You can refer to this section to add file name extensions.</p>
<div class="section" id="EN-US_TOPIC_0000001337156461__section9947202395315"><h4 class="sectiontitle">Procedure</h4><ol id="EN-US_TOPIC_0000001337156461__ol159217814715"><li id="EN-US_TOPIC_0000001337156461__li17143826135210"><span>On the navigation pane, choose <strong id="EN-US_TOPIC_0000001337156461__b968420581014">Explore</strong> &gt; <strong id="EN-US_TOPIC_0000001337156461__b1768411561010">Ransomware Protection</strong> &gt; <strong id="EN-US_TOPIC_0000001337156461__b176841857102">Ransomware Detection</strong>.</span></li><li id="EN-US_TOPIC_0000001337156461__en-us_topic_0000001166366216_en-us_topic_0000001091431193_li12591123311535"><span>On the <span class="uicontrol" id="EN-US_TOPIC_0000001337156461__uicontrol151981616171611"><b><span id="EN-US_TOPIC_0000001337156461__text1726214085">File Name Extension Filtering Rule</span></b></span> tab page, click <span class="uicontrol" id="EN-US_TOPIC_0000001337156461__uicontrol17308229244"><b>Create</b></span>.</span><p><p id="EN-US_TOPIC_0000001337156461__p24069190226">The <strong id="EN-US_TOPIC_0000001337156461__b14155112615618">Create File Name Extension Filtering Rule</strong> dialog box is displayed.</p>
<p id="EN-US_TOPIC_0000001337156461__p184581835143819"><span><img id="EN-US_TOPIC_0000001337156461__image1610103653818" src="en-us_image_0000001343232673.png"></span></p>
</p></li><li id="EN-US_TOPIC_0000001337156461__li1236704561811"><span>Set parameters of the file name extension filtering rule.</span><p><p id="EN-US_TOPIC_0000001337156461__p4779111121910"><a href="#EN-US_TOPIC_0000001337156461__table373910544193">Table 1</a> describes the related parameters.</p>

<div class="tablenoborder"><a name="EN-US_TOPIC_0000001337156461__table373910544193"></a><a name="table373910544193"></a><table cellpadding="4" cellspacing="0" summary="" id="EN-US_TOPIC_0000001337156461__table373910544193" frame="border" border="1" rules="all"><caption><b>Table 1 </b>Parameters of the file name extension filtering rule</caption><colgroup><col style="width:22.1%"><col style="width:77.9%"></colgroup><thead align="left"><tr id="EN-US_TOPIC_0000001337156461__row9739135420196"><th align="left" class="cellrowborder" valign="top" width="22.1%" id="mcps1.3.2.2.3.2.2.2.3.1.1"><p id="EN-US_TOPIC_0000001337156461__p673965415198">Parameter</p>
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<th align="left" class="cellrowborder" valign="top" width="77.9%" id="mcps1.3.2.2.3.2.2.2.3.1.2"><p id="EN-US_TOPIC_0000001337156461__p6739125421915">Description</p>
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<tbody><tr id="EN-US_TOPIC_0000001337156461__row47391054181917"><td class="cellrowborder" valign="top" width="22.1%" headers="mcps1.3.2.2.3.2.2.2.3.1.1 "><p id="EN-US_TOPIC_0000001337156461__p27393548197">File Name Extensions to Be Intercepted</p>
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<td class="cellrowborder" valign="top" width="77.9%" headers="mcps1.3.2.2.3.2.2.2.3.1.2 "><p id="EN-US_TOPIC_0000001337156461__p16739175417199">File name extensions to be intercepted. You can enter one or more file name extensions.</p>
<p id="EN-US_TOPIC_0000001337156461__p35134612237">[Value range]</p>
<ul id="EN-US_TOPIC_0000001337156461__ul19507182614253"><li id="EN-US_TOPIC_0000001337156461__li165071226112512">The value contains 1 to 127 characters.</li><li id="EN-US_TOPIC_0000001337156461__en-us_topic_0000001159963183_li18249801">A file name extension can contain only digits, letters, spaces, and special characters (!"#$%&amp;'()*+,-./:;&lt;=&gt;?@[\]^_`{|}~). Wildcards <strong id="EN-US_TOPIC_0000001337156461__b17451056172116">?</strong> and <strong id="EN-US_TOPIC_0000001337156461__b17925105822111">*</strong> are supported, and wildcard <strong id="EN-US_TOPIC_0000001337156461__b73231217221">*</strong> must be the last character. For example, <strong id="EN-US_TOPIC_0000001337156461__b207566722217">T?X</strong> or <strong id="EN-US_TOPIC_0000001337156461__b15316111202220">Tx*</strong>.</li><li id="EN-US_TOPIC_0000001337156461__li1678595195014">Separate multiple file name extensions with commas (,).</li></ul>
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<tr id="EN-US_TOPIC_0000001337156461__row67391454121915"><td class="cellrowborder" valign="top" width="22.1%" headers="mcps1.3.2.2.3.2.2.2.3.1.1 "><p id="EN-US_TOPIC_0000001337156461__p137391254181916">Associate with vStore</p>
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<td class="cellrowborder" valign="top" width="77.9%" headers="mcps1.3.2.2.3.2.2.2.3.1.2 "><p id="EN-US_TOPIC_0000001337156461__p1673917542196">Select whether to associate a vStore.</p>
<ul id="EN-US_TOPIC_0000001337156461__ul12416154142612"><li id="EN-US_TOPIC_0000001337156461__li24164549260">Off: The file name extension filtering rule is created but is not associated with any vStore.</li><li id="EN-US_TOPIC_0000001337156461__li5297105612269">On: The file name extension filtering rule is created and vStores to be associated are selected from the vStore list.</li></ul>
<div class="note" id="EN-US_TOPIC_0000001337156461__note280018516354"><span class="notetitle"> NOTE: </span><div class="notebody"><p id="EN-US_TOPIC_0000001337156461__p17285164910332">By default, the preset file name extension filtering rule is associated with all vStores in the system.</p>
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</p></li><li id="EN-US_TOPIC_0000001337156461__li5766134019479"><span>Click <span class="uicontrol" id="EN-US_TOPIC_0000001337156461__uicontrol19452464012"><b>OK</b></span>.</span></li></ol>
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<div class="parentlink"><strong>Parent topic:</strong> <a href="en-us_topic_0000001337315957.html">Configuring a File Name Extension Filtering Rule</a></div>
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